I backup my games to a WD Elements hard drive, but some of the games (the new supermario, pacman, supermario smash brawl) kept freezing at a specific point. I deleted and re-install, but no luck. Other games work fine. Please let me know if you've ran into this and how it was solved.
Here try this post by messie that I found on this website.
Hope this will solve your issues with usbHTML Code:http://www.wiihacks.com/game-playing-issues-some-specific-backups-softmods-only/41494-what-do-if-game-not-working.html
Please Click Thank, If I help you